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Finding the Fourth Proportional to 101.45, 151.13 and 99.05

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Solution

The fourth proportional to 101.45, 151.13 and 99.05 is: 147.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.45 : 151.13 = 99.05 : x
  2. Step 2: Convert to fraction form
    101.45/151.13 = 99.05/x
  3. Step 3: Cross multiply
    101.45x = 151.13 × 99.05
  4. Step 4: Simplify right side
    101.45x = 14,969.43
  5. Step 5: Solve for x
    x = 14,969.43/101.45
  6. Step 6: Final answer
    x = 147.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.